Epidemiologic Methods: The Essentials is a concise, but thorough volume that provides a solid grounding in core methodologic issues.The book takes a streamlined approach on cohort studies, case-control studies, prevalence studies, randomized trials, demographic studies of morbidity and mortality, ecologic studies, screening, effect modification, bias and confounding. Organized according to study design, with each chapter building on those preceding it, the book provides detailed examples throughout, using data tables and graphs to reinforce methodologic points.